My parents did not interfere with me dating someone really fairly horrible for my first boyfriend and someone vastly unsuitable for my second, and I'm glad.

My parents were also very hands-off about who I dated. Overall it's worked well, but I do kinda wish that one of them had said to me at some point, "You know your intended better than I do, of course, but I'm a little concerned about X that I've observed about them. However, I trust your judgement, and this is all I'll ever have to say on the subject." On the other hand, I don't have to worry about them criticizing my partner or spouse either; I know that as long as I'm happy with the person, even if my folks don't like something about them, they'll keep quiet about it.